printMatrix.py

m = [[ 1, 4, -2],
 [-2, 3, 4],
 [ 3, 1, 3]]

print "print diagnonally from start:"
for i in range(len(m)):
 for j in range(i+1):
 print m[i-j][j],
for i in range(len(m[0])-1):
 k = len(m) - 1
 for j in range(i+1, len(m[0])):
 print m[k][j],
 k -= 1

print ""
print "print diagnonally from end:"
for i in range(len(m[0]), 0, -1):
 k = len(m)-1
 for j in range(i, len(m[0])):
 print m[k][j],
 k -= 1
for i in range(len(m)-1, -1, -1):
 for j in range(i,-1, -1):
 print m[j][i-j],